Microsoft took down Tay because it - she? he? - was too effective at learning. Tay channelled us back to us. But I wonder what kind of artificial saint we could build, if we controlled the release of Tay 2. Maybe delayed input, or moderated input? All our good thoughts only.
No, wait. Terry Pratchett got there first. Was it Feet of Clay in which the clay people attempt to build their perfect artificial descendant?